Distillation column minimum flow arrangement
AssigneeSaudi Arabian Oil Company
InventorsSoelistiono Koesoemo Prasetiyo, Ibrahim Saeed Alghamdi, Moath Khalid Almansour
Life of this patent
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Abstract
A distillation system operating below minimum flow. The distillation column is configured for separating a mixed feed into one or more fractional mixtures, producing an overhead product and a bottom product. A bottom return line is provided for returning at least a portion of the bottom product to supplement the mixed feed to the distillation column. A control valve is configured for controlling a flow rate in the bottom return line. A feed surge drum is configured for receiving a feed from the bottom return line and fresh feed, producing the mixed feed.
Claims11
A distillation system comprising:
- a distillation column configured for separating a mixed feed into one or more fractional mixtures, producing an overhead product and a bottom product;
- a bottom return line configured for returning at least a portion of the bottom product to supplement the feed;
- a control valve configured for controlling a flow rate in the bottom return line;
- and
- a feed surge drum configured for receiving a feed and the bottom product from the bottom return line, producing a mixed feed.
A distillation system configured as an NGL stripper, comprising:
- a distillation column configured for separating a mixed feed of NGL into one or more fractional mixtures, producing an overhead product and an NGL bottom product;
- a bottom return line configured for returning at least a portion of the NGL bottom product to a feed surge drum;
- a control valve configured for controlling a flow rate in the bottom return line;
- and
- wherein the feed surge drum is configured for receiving a feed and a portion of the bottom product from the bottom return line, producing the mixed feed of NGL.
Dependencies are inferred from the claim text.